ip6_gre: fix a dst leak in ip6erspan_tunnel_xmit
authorXin Long <lucien.xin@gmail.com>
Fri, 13 Sep 2019 09:45:47 +0000 (17:45 +0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 16 Sep 2019 07:08:18 +0000 (09:08 +0200)
commit28e486037747c2180470b77c290d4090ad42f259
treef013c15d0c3921b8b89258f4a3175b007791c9aa
parentacdcecc61285faed359f1a3568c32089cc3a8329
ip6_gre: fix a dst leak in ip6erspan_tunnel_xmit

In ip6erspan_tunnel_xmit(), if the skb will not be sent out, it has to
be freed on the tx_err path. Otherwise when deleting a netns, it would
cause dst/dev to leak, and dmesg shows:

  unregister_netdevice: waiting for lo to become free. Usage count = 1

Fixes: ef7baf5e083c ("ip6_gre: add ip6 erspan collect_md mode")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv6/ip6_gre.c